On my current site, the one I'm replacing with xcart, I have a tell a friend feature and it bcc's me on all emails. Interesting reading.
Sometimes it ticks me off - like when they email other stores and say "I want this, can you beat their price?" (that happens a lot) but other times it's informative because I learn what customers REALLY think and that can be helpful when making decisions. Sometimes I wish I hadn't read them because people say some very personal things to each other. It'll start out, look at this product and end with uh, well, private conversation. I guess it never occurs to them that it's being logged.
Anyway, thanks for posting this. I've not yet decided if I want this feature on the new site, but if I do I will give this one a go. Anyone using it on the latest 3.5?
~Beth